Ventilating apparatus



(No Model.)

L. J. WING. VENTILATING APPARATUS.

Patented Oct. 2, 1883.

EST:

INVENTUF]: I

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NITED STATES PAT LEVI .T. \VING, Ol? BROOKLYN, NEYV YORK.

\ /ENTILATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 285,865, dated October 2, 1.88

Application filed January 5, i883.

To all whom it may concern:

Be it known that I, LEVI J. XVING, a citizen. of the United States of America, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Ventilating Appa ratus, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an apparatus for ventilating buildings, factories, mines, and for all similar purposes.

The invention consists, essentially, in a novel construction, arrangement, and combination of a fan-wheel and its blades andconneetions, whereby provision is made for adjusting the various parts to different positions, all as here inafter more particularly described.

In the accompanying drawings, Figure 1. represents a side view of m y improved vei'itilator. Fig. 2 is a transverse vertical section 'takenin line 90 m, Fig.1. Fig. 3 is a cross-section of blade, taken in line ;1 2 of Fig. 1.

Similar letters indicate similar parts.

The cylindrical casing A has its ends or sides of skeleton form, made of cast-iron, and so constructed and arranged as to allow a sheet-iron pipe to be slipped on either end,for the purpose of carrying air any distance required, and provided with adjustable 'our1ialboxes B, in which the iairshaft O has its bearings. Theseboxes or bearings are divided, and are provided with. set-screws b, by means of which they may be adjusted at pleasure. The lower box of each bearing is cast hollow or in two sections, and forms an oilcellar, receiving the surplus oil applied, or may be filled when first used. In the center of this lower box is placed a worsted or cotton wick,with one end touching bearing of shaft, keepingthe bearing lubricated.

The fan-blades I) are curved in their crosssection, as shown in Fig. 3, and are spread from the inner to the outer end,for the purpose of producing a gradually increasing or expanding pitch from the anterior to the posterior portion of the blade. The anterior part of the surface of the blade having set the air in motion, the posterior part or portion of the blade,

0 havin a 'reater or ex )andin iitch n-o )els b h a 7 (No model.)

, the air with greater and increased velocity.

Each blade is held in position by a wroughtiron arm, to which the blades are riveted o'r bolted. Each arm has a thread cut on it to screw it into the hub 10, with a janrnut, c, between said hub and the blade. the blades can be increased or diminished to suit different circumstances by slackening the j am-nut c and turning or changing the angle of the blade with the shaft, then tightening the jam-nut against thehub to retain it in position, thereby enabling the ventilating fan to be changed from an exhaustfan to a i'orceblower without changing the position of fan-belts, pipes, &c., it being only necessary to change the angle or position of the blades. Thus it can be alternated to suit demands in use. The

.blades can be reversed so as to change the fan from an exhauster to a forceblowerthat is, the blades being reversed by slackening the jam-nut, and being turned around, the curvature of the blades is reversed. This is done without changing the direction of the Fan, and without any change of belt.

The hub E is held fast on the shaft (1 by means of set-screws f. Between the hub and the bearings B on the shaft are placed collars G, held in place by set-screws h. As herein shown, the shaft G has a driving-pulley, J, at one end. \Vhen it is desired to change the pulley J from one end of the shaft to the other,

the setscrews b, f, and h are loosened. The

pulley is then removed and the shaft moved longitudinally to the desired position, after.

which the setscrews are tightened, as' beIorethat is, if it be not practicable or advisable to drive the fan with the pulley J on. the'suction. or receiving side of the fan, the shaft can be pushed through and be driven from thedelivery side of the i'an.

That I claim, and desire to secure by Letters Patent, is

"1. A ventilati ng-fanhavi n g its blades curved transversely and spread from the inner to the outer end to produce an expanding pitch from the anterior to the posterior edges of the blades, in combination with a means for adjusting the angle of such blades relatively to the axis of the fan, as and for the purpose herein described.

2. in a ventilating-1hr], the combination of The pitch of a hub, E, and fan-b1ade D, curved in crosssectlon and spread from the inner to the outer end, with screw-shank (Z and jam-nut 6, sub- 5. In a ventilating-fan, the combination, with the longitudinal adjustable shaft 0, and I 5 with the fan-blades and detachable pulley fixed to said shaft, of the boxes or bearings B and set-screws b, the collars G, set-screws h, hub

E, and set-screws f, substantially as and for the purpose shown and described. I 20 In testimony whereof I affix my signature in presence of two Witnesses.

LEVI J. WING.

Witnesses:

FRANCIS O. BoWEN, Cums. P. WARDER. 

